A, blanking: the control of raw material before blanking is the same as the quality of raw material before the same number of raw materials.
B, school leveling: usually pay attention to the control of the scratch on the surface of the product. When the product is in the school, the protective film must be attached both sides to ensure that the surface of the product is not scratched. If the scratch can not be avoided because of the machine and equipment reasons, the surface without surface treatment will be placed on it to ensure no scratch;
C and sinking: (1) the direction of the sinks must conform to the requirements of the drawing (as the reference of the original drawing of the customer); (2) the sinking hole shall not sink the bottom hole, and the reverse side of the countersunk must not affect the contact with other fittings; (3) the size of the sinks must be in accordance with the drawings. The head screw or pull rivet should not be high out of the surface of the sinks with the screw or rivet head; (4) the sinks must be round, and the drill must not sink to the outside to cause obvious concave holes around the sinks; 5. When the sinks are made, the iron chips must be cleaned out in time to prevent the scraps from scratching. Is not the same size; the wrong position don't sink or drain hole;
D, reaming: (1) the size of the reaming must be in accordance with the requirements of the drawing; secondly, the burr must be removed after the reaming, and the burr after the reaming is generally used for the chamfering of the bit larger than the reaming, and the surface treatment can not be covered with the burr to remove the burr. (3) to the round hole of the riveting nut to the burr chamfering Should not be too big chamfering to avoid nut pressure riveting not tight nut phenomenon; (4) to reaming or deburring in the corner of the iron fillet must be cleaned in time so as not to scratch the product;
E, attack teeth: 1. According to the drawing requirements to attack different types of thread, no leaky tapping phenomenon; (2) no obvious burr around the thread hole after the tapping, and when the chamfering of the teeth is not easy to overturn; when the tapping or chamfering, the operator must aim at the bottom hole to prevent the taps or drill from drilling to the surface of the product to produce imprint; (4) screw Print inspection: in principle, it is required to use the check rules to stop the rules. (5) for the common thread (of our factory assembly thread) as long as its supporting screws can easily enter the non sliding teeth, OK is not strictly required to check the rules, for the products to be electroplated in the test thread, the rules must be passed, the check is allowed a little more than a few, For aluminum products, the threaded holes that need to be oxidized must be blocked when the screw can be easily entered, but the check must stop to prevent the thread slipping after oxidation.
F, pull riveting: (1) the riveting product can not be loosened; (2) there is no obvious defect on the surface of the rivet; (3) the pull rod after riveting cannot be transparent, and the rod broken in the rivet is not allowed to go down and slosh and slosh; (4) the rivet head shall not be high on the surface of the sinks of the product, and may not have the phenomenon of pulling and deflection; 5 There must be no leakage and riveting; 6. After riveting, the product must be used with the components supporting the riveting and check whether the gap gap after the whole product is riveted is in conformity with the customer inspection standard.